Apparatus for grinding arcuate or annular work



July 18, 1950 H. E. CASTON 2,515,695

APPARATUS FOR GRINDING ARCUATE OR ANNULAR WORK Filed July 31, 1947 sSheets-Sheet 1 IN VEN TOR.

HENRY E ms TON Gaol-nay July 18, 1950 H. E. cAsToN 2,515,695

APPARATUS FOR GRINDING ARCUATE 0R ANNULAR WORK Filed July 31, 1947 I Y'5 Sheets-Sheet 2 INVENTOR.

HENRY E. CH5 TON Claw-1 July 18, 1950 CASTQN 2,515,695

APPARATUS FOR GRINDING ARCUATE OR ANNULAR WORK Filed July 31, 1947 3Sheets-Sheet 3 INVENTOR.

HENRY E. CASTO/V Utter/15y bracket, to extend radially inwardly thereofa substantial distance, and nuts 31 are provided on radially outwardlyprojecting ends of the pins for locking the same in adjusted position.The pins are of metal of a character which permits the inner endsthereof to be ground to a predetermined radius from the center ofbacking plate M, in a manner to be described later, for accurateorienting'engagement with said outer periphery of the segment.

In the use or operation of the improved ap-,-

paratus for grinding a segmental ring I!) of given size, such as thesize best shown in Figures 1, 2 and 4, the brackets l8, through thebolts 25 and 26, are radially adjusted along the slotstocircumferentially spaced positions in which the inner ends of thethree triangularly arranged'or staggered pins 34, 35 and 36, of therespective brackets, are at a radius from the center of backing plate J4slightly less than the true radius of the outerperiphery of the ring ID,or in other words of the segments. With the segments clamped in thisrelation, as best shown in Figure '3, the'operator through adjustment ofhand wheels H and R (Figure 6), may present the rotary grinding wheel W,while rotating at suitable, speed, at the desired position and angle togrind the inwardly-presented ends of the pins to, an accuratelypredetermined radius the. same asithje given radius of the outerperipheral surfaces of the ring segments IL,

,,With the pins thus accurately radiused at the inner ends, theoperatornext mounts a segment I! in each bracket 2|], holding the outerperipheral. surface thereof self-centeringly against the ends of thepins, and thenfirmly clamps the segment between the spacer blocks 29,29, and the clampinglug 3|, by tightening the screw '32. A separatespacer block 38, may be clampinglyv engaged between an outwardlyextending portion 3la offthe lug 3| and the outer flange 24 to en hancesaid clamping action on the segment H..

When all of the segments are similarly clamped in accurately centeredrelation, the operatormay move rotary grinding wheel W to variousangularly adjusted positions to grind the various inner surface portionsof the segments, as shown in Figure 4, for example. manner be accuratelyresurfaced to predetermined. contour, as checked from time-to-time witha contour template- The apparatus may be similarly operated and used forregrinding either segmental or continuous rings of various sizes andproportions, by radially adjusting the brackets I 8 and grinding theends of pins 34, 35 and 36 accordingly in each instance.- If necessary,the metal spacer blocks 29 .may be ground by use of wheel W to adjust.

the work to suit the clamping lugs 3|. In any case the segments IIshould project beyond the outer edgesof the brackets thereof to beproperly engaged by the clamping lugs.

.Referring now to Figure 5, there is shown work-supporting and grindingapparatus, which is inl all respects likev that previously describedexcept that it is designed for grinding the outside surfaces of annularor arcuate work, such as segments 40 of a segmental ring 4 l, Eachsegment is oriented or centered against pre-ground, arcuate ends ofthreepins 43, 44 and 45 in each of a series of brackets 46, radiallyadjustably mountedona rotatablebacking plate 42, as before, the ends ofthe pins, however, being pre'-. sented outwardly and engagin innerperipheral portions of the segment. Clamping lugs 41, cor- The work mayin this.

4 responding to lugs 3|, are operable by means of screws 48 to hold thework in position on the bracket 46 and against the backing plate.

Other modifications of the invention may be resorted to withoutdeparting from the spirit thereof or the scope of the appended claims.

What is claimed is:

1. In apparatus for treating arcuate or annular work, the combinationwith a cutter or other treating tool adjustably mounted to be presentedin various adjusted positions, of a support, a backing member mounted onsaid support to rotate about an axis and having a work-supporting faceportion in a plane transversely of said axis, p0wer means operable torotate said backing member about its axis, a work-holding bracket,'means for mounting said bracket on said backing member against saidface portion thereof in difierent adjusted positions radially of saidaxis, saidbracket having orienting projections extending therefromradially of said axis fo'ri engaging one arcuate side of the work, anadjustable clamping device of said bracket for clamping the work againstsaid face portion of the backing member while said arcuate side ofthe'work is oriented against said projections, thereby to present theopposite arcuate side of the Work for treating engagement by said toolas. said member is rotated.

"2. The combination as set forth in claim 1 said orienting projectionscomprising elements radiallyfadjustable to fixed positions with respecttolsaid brackets presenting free endsof the ele ments atlradiicorresponding to radii of said opposite, arcuate side ofv the work.

3 'Ihecombination as set forth in claim 2, said free' endslof saidelements being of material which canibe" reduced by said tool toaccurately predetermined radii complemental to the radii of thefirst-named arcuate side of the work.

lf'In apparatus for treating arcuate or annular work, the combinationwith a cutter or other treating tool adjustably mounted to be presentedin various adjusted positions, of a support, a

backing member mounted to rotate about an axis .and having awork-supporting face portion in a plane transversely of said axis, powermeans j operable to rotate said backing member about its axis, aplurality of Work-holding brackets,

adjustable means for mounting said brackets on said backing memberagainst said face portion thereof in different I adjusted positionsradially of said axis, said brackets each having a plurality oforienting projections extending therefrom I radially of said axis forengaging an arcuate side. of the work, an adjustable clamping device oneach said bracket for releasably clamping the work against said faceportion of said backing member while said arcuate side of the work isoriented against said projections, thereby to present the first-namedarcuate side of the work for. treating engagement by said tool as said,

member is .rotated.

5. The combination as set forth inclaim 4, said orienting projectionscomprising elements radially adjustable to fixed positions with respectto said brackets presenting free ends of the elementsat radiicorresponding to radii of the firstnamed arcuate. side of the work.

the first-namedarcuate side of the work.

'7. The combination as set forth in claim 6, said adjustable mountingmeans comprising a radial slot in said member for each said bracket,guide portions on said brackets slidably engageable along said slots,and clamping bolt means through said brackets and said slots.

8. In apparatus for treating arcuate an annular work, the combinationwith a cutter or other treating tool adjustably mounted to be presentedin various adjusted positions, of a support, a backing member mounted onsaid support to rotate about an axis and having a work-supporting faceportion in a plane transversely of said axis, power means operable torotate said backing member about its axis, a plurality of work-holdingbrackets adjustable means for mounting said brackets on said backingmember against said work-supporting face portion thereof in differentadjusted positions radially of said axis, said brackets each having atleast three transversely and circumferentially spaced orientingprojections extending therefrom radially of said axis for engaging anarcuate side of the work, an adjustable clamping device on each saidbracket for releasably clamping the work against said face portion ofsaid backing member while said arcuate side of the work is orientedagainst said projections, thereby to present the firstnamed arcuate sideof the work for treating engagement by said tool as said member isrotated.

9. The combination as set forth in claim 8, said r free ends of saidprojections being of material which can be reduced by said tool toaccurately predetermined radii complemental to the radii of thefirst-named arcuate side of the work.

10. In apparatus for treating arcuate or annular work, the combinationwith a cutter or other treating tool adjustably mounted to be presentedin various adjusted positions, of a support, a backing member mounted onsaid support to rotate about an axis and having a, work-supporting faceportion in a plane transversely of said axis, power means operable torotate said backing member about its axis, a plurality of work-holdingbrackets, adjustable means for mounting said brackets on said backingmember against said work-supporting face portion thereof in differentadjusted positions radially of said axis, said brackets each having aplurality of orienting projections extending inwardly radially of saidaxis for engaging an arcuate side of the work, an adjustable clampingdevice on each said bracket for releasably clamping the work againstsaid face portion of said backing member while said arcuate side of thework is oriented against said projections, thereby to present thefirstnamed arcuate side of the work for treating engagement by said toolas said member is rotated.

HENRY E. GASTON.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 433,919 Wickers Aug. 5, 18901,993,831 Dall Mar. 12, 1935 2,208,879 Blazek et a1. July 23, 1940FOREIGN PATENTS Number Country Date 325,606 Germany Sept. 15, 1920

